Witty Pi 4 Mini is an add-on board that adds real time clock (RTC) and power management to your Raspberry Pi. It can define your Raspberry Pi’s ON/OFF sequence, and significantly reduce the energy usage. Witty Pi 4 Mini is the fourth generation of Witty Pi and it has these hardware resources onboard: https://elecena.pl/product/18515256/witty-pi-4-mini-rtc-power-management-for-raspberry-pi 2021-05-19 https://elecena.pl/product/18515256/witty-pi-4-mini-rtc-power-management-for-raspberry-pi 2026-02-18